This National Marker Company signage instructs workers or technicians to make sure that wheel chocks are removed and stowed. It is commonly used in garages or workshops to keep the places well organized. The legend âCAUTION - MAKE SURE THAT WHEEL CHOCKS ARE REMOVED AND STOWEDâ is printed in legible font to give more readability. The sign is UV resistant, chemical resistant and graffiti proof. It has yellow text on black base and black text on yellow base. The rectangular caution sign complies with OSHA standards and has NMC Sign Muscle coating to protect the text against fading, scratches, scuffing, mold, and moisture.